Stock-Based Compensation and Equity - Reclassifications Out of Accumulated Other Comprehensive Loss Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	$ 6,948,173	$ 6,830,055
Amounts reclassified from accumulated other comprehensive loss to:
Other gains and (losses)	4,423	(955)
Interest expense	52,540	61,313
Net current period other comprehensive (loss) income	(39,351)	2,313
Ending equity balance	6,773,076	7,017,729
AOCI Including Portion Attributable to Noncontrolling Interest
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive loss before reclassifications	(35,806)	5,768
Amounts reclassified from accumulated other comprehensive loss to:
Total	(3,545)	(3,455)
Net current period other comprehensive (loss) income	(39,351)	2,313
AOCI Including Portion Attributable to Noncontrolling Interest | Amounts reclassified from accumulated other comprehensive loss to:
Amounts reclassified from accumulated other comprehensive loss to:
Other gains and (losses)	(3,783)	(3,522)
Interest expense	238	67
Gains and (Losses) on Derivative Instruments
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive loss before reclassifications	16,394	5,404
Amounts reclassified from accumulated other comprehensive loss to:
Total	(3,545)	(3,455)
Net current period other comprehensive (loss) income	12,849	1,949
Gains and (Losses) on Derivative Instruments | Amounts reclassified from accumulated other comprehensive loss to:
Amounts reclassified from accumulated other comprehensive loss to:
Other gains and (losses)	(3,783)	(3,522)
Interest expense	238	67
Foreign Currency Translation Adjustments
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive loss before reclassifications	(52,200)	(173)
Amounts reclassified from accumulated other comprehensive loss to:
Total	0	0
Net current period other comprehensive (loss) income	(52,200)	(173)
Foreign Currency Translation Adjustments | Amounts reclassified from accumulated other comprehensive loss to:
Amounts reclassified from accumulated other comprehensive loss to:
Other gains and (losses)	0	0
Interest expense	0	0
Gains and (Losses) on Investments
Reconciliation Of Accumulated Comprehensive Income
Other comprehensive loss before reclassifications	0	537
Amounts reclassified from accumulated other comprehensive loss to:
Total	0	0
Net current period other comprehensive (loss) income	0	537
Gains and (Losses) on Investments | Amounts reclassified from accumulated other comprehensive loss to:
Amounts reclassified from accumulated other comprehensive loss to:
Other gains and (losses)	0	0
Interest expense	0	0
Accumulated Other Comprehensive Income (Loss)
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	(255,667)	(254,996)
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	(295,018)	(252,683)
Gains and (Losses) on Derivative Instruments
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	13,048	14,102
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	25,897	16,051
Foreign Currency Translation Adjustments
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	(268,715)	(269,091)
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	(320,915)	(269,264)
Gains and (Losses) on Investments
Reconciliation Of Accumulated Comprehensive Income
Beginning equity balance	0	(7)
Amounts reclassified from accumulated other comprehensive loss to:
Ending equity balance	$ 0	$ 530